Heat Control Board Flashing Code 1

Trane Reliatel Rooftop Units 

Re: Heat Fault Code 1

Reliatel gas/electric rooftop units have a Heat Control Board as well as the Reliatel Control Board.

There are several version of the Heat Control Board, but two main varieties: 1) Spark ignition and 2) Hot Surface ignition.

The Heat Control Board has an LED for displaying status & fault information. It is very common for the heat faults to not be shown anywhere on the Trane diagrams.

Code 1 = Communication Fault

The Heat Control Board uses Modbus communications to communicate with the Reliatel Control Board. A Code 1 indicates a loss of communications between the two.